Many – but not all – sleeping bags comply with the EN13537 test (updated in recent years to ISO 23537-1:2016), a European standard for sleeping bag temperature ratings. We only supply bags that have been EN13537/ISO 23537-1:2016 rated.
An EN13537 rating gives a temperature range that a typical user can use as a guide for the conditions in which their bag will be most effective. Because women generally sleep colder than men, the ‘typical’ user is defined as a woman.
The standard measures three temperature ratings:
Comfort is the temperature at which a woman can expect to sleep comfortably, without feeling cold, and in a relaxed position (not curled up).
Lower Limit is the temperature at which a man – by definition warmer – in a curled position will start to feel cold, but not to the point of shivering. This is the limit of performance for the sleeping bag.
Extreme is the temperature anyone can expect to feel particularly cold and there is a risk of hypothermia. You should only use the sleeping bag in this range in an emergency.
Just so you know: the EN/ISO temperature test uses a thermal mannequin – a humanoid test-dummy with temperature sensors and an internal heating system – which is dressed in a clothing layer producing a consistent, minimal thermal value. The mannequin is out into the sleeping bag and both are placed inside a sealed climate chamber, on top of a timber plank. The mannequin is then heated to simulate body warmth, while also being subjected to various air temperatures inside the climate chamber. Sensors on the mannequin’s skin surface are able to trace and record the surrounding temperature including the insulation/thermal resistance value of the test sleeping bag.
Fascinating, eh.
An idiosyncratic Tasmanian concept required by the island’s four-seasons-in-one-hour weather extravaganza. Gail understands it to mean that in order to get through a day you need to find a way to empty your entire wardrobe onto your body in Michelin Man style, then drape what you can’t wear in easy reach. In practice it’s wise to have both a sun hat and beanie close to hand; you’ll almost certainly need both through the course of the day. For Ian’s perhaps more practical advice, visit our FAQ on how to keep warm.
An idiosyncratic Tasmanian concept required by the island’s four-seasons-in-one-hour weather extravaganza. Gail understands it to mean that in order to get through a day you need to find a way to empty your entire wardrobe onto your body in Michelin Man style, then drape what you can’t wear in easy reach. In practice it’s wise to have both a sun hat and beanie close to hand; you’ll almost certainly need both through the course of the day. For Ian’s perhaps more practical advice, visit our FAQ on how to keep warm.
Gail says – as in, humans and other fauna. But if my jacket self-breathes, it must therefore be alive, and ewwww. Ian rolls his eyes and says this handy term refers to the various microporous membranes that allow water vapour to escape but resist the entry of water droplets, the first (but by no means last) and arguably still best-known of which is Gore-Tex.
Fun facts about Gore-Tex manufacturer, W.L. Gore & Associates:
* Apollo 11 astronauts Neil Armstrong and ‘Buzz’ Aldrin installed seismographic equipment on the Moon in 1969. It was connected to the lunar lander with a lightweight cable made by Gore.
* The first two Gore-Tex products sold were a joint sealant for industrial pipes and a pipe thread tape.
Gail says – as in, humans and other fauna. But if my jacket self-breathes, it must therefore be alive, and ewwww. Ian rolls his eyes and says this handy term refers to the various microporous membranes that allow water vapour to escape but resist the entry of water droplets, the first (but by no means last) and arguably still best-known of which is Gore-Tex.
Fun facts about Gore-Tex manufacturer, W.L. Gore & Associates:
* Apollo 11 astronauts Neil Armstrong and ‘Buzz’ Aldrin installed seismographic equipment on the Moon in 1969. It was connected to the lunar lander with a lightweight cable made by Gore.
* The first two Gore-Tex products sold were a joint sealant for industrial pipes and a pipe thread tape.
Remember during the 2014 election (says Gail) when Tony Abbott was on talk radio and someone rang in to say they had to work as a phone sex operator to make ends meet and Abbott – as a subconscious reaction – winked? The particular tic that leads to winking = wicking.
Sigh (says Ian). To wick is to absorb or draw off liquid by capillary action. Thus good base-layer garments wick moisture away from the skin.
An idiosyncratic Tasmanian concept required by the island’s four-seasons-in-one-hour weather extravaganza. Gail understands it to mean that in order to get through a day you need to find a way to empty your entire wardrobe onto your body in Michelin Man style, then drape what you can’t wear in easy reach. In practice it’s wise to have both a sun hat and beanie close to hand; you’ll almost certainly need both through the course of the day. For Ian’s perhaps more practical advice, visit our FAQ on how to keep warm.